Submit interesting and specific facts that you just found out (not broad information you looked up, TodayILearned is not /r/wikipedia).

Posting rules

Submissions must be verifiable. Please link directly to a reliable source that supports every claim in your post title.Images alone do not count as valid references. Videos are fine so long as they come from reputable sources (e.g. BBC, Discovery, etc).

No personal opinions, anecdotes or subjective statements (e.g "TIL xyz is a great movie").

No recent sources. Any sources (blog, article, press release, video, etc.) with a publication date more recent than two months are not allowed.

No submissions regarding or related to the following

Recent politics/politicians

Police misconduct

Inflammatory submissions relating to religion/race/gender

No misleading claims. Posts that omit essential information, or present unrelated facts in a way that suggest a connection will be removed.

Rephrase your post title if the following are not met:

Titles must begin with "TIL ..."

Make them descriptive, concise and specific (e.g. not "TIL something interesting about bacon").

Titles must be able to stand on their own without requiring readers to click on a link. Starting your title with a why/what/who/where/how modifier should be unnecessary.

"TIL about ..." and other broad posts don't belong on TIL. Try /r/Wikipedia, etc. instead, or be more specific (and avoid the word "about").

Frequent TILs Repost List

As of January 2018

This list was compiled from /r/todayilearned community suggestions by its members. If your TIL is found on this list, it will be removed. The titles have been abridged for the sake of brevity, however the context remains the same. This list is subject to change. The purpose is to keep content fresh on /r/todayilearned as requested by its members. If you are interested in reading about the TILs on this list use the search box feature and enter the keywords to pull up past TILs.